Also, consider just printing out the legal two letter words and leaving them there for anyone to check ... Saves on the "win by memory" and allows more tactical play by all.
I've been playing like that with my parents (in their 80s) and it makes for a much more fun game!
My wife and I used to play regularly and printed out a list of two and three letter words that we could refer to under our rules. It helped us learn those words.
I've been playing like that with my parents (in their 80s) and it makes for a much more fun game!